What is the limit on PST size?

The limit on PST (Personal Storage Table) file size varies depending on the version of Microsoft Outlook. For Outlook 2002 and earlier, the maximum size is 2 GB. In Outlook 2003 and later versions, the default limit is increased to 20 GB, but it can be raised to 50 GB or more by modifying registry settings. However, it's generally recommended to keep PST files smaller for better performance and manageability.